[Flask] Help with Blueprints ...

[Ben Duncan]

Ok, I followed to the letter :
https://hackersandslackers.com/managing-user-session-variables-with-flask-sessions-and-redis/
(but not the redis)
And from Miguels Fine book - Flask Mega Tutorial
and neither 'session' nor 'g' is in the application context. I'm beginning
to wonder if there is a a bug somewhere ...


*Ben Duncan*
DBA / Chief Software Architect
Mississippi State Supreme Court
Electronic Filing Division


On Thu, Oct 31, 2019 at 9:32 AM Ben Duncan <linux4ms at gmail.com> wrote:

> Ok, tried:
> import sys
>
> from flask import Flask, g, session
> from flask_sqlalchemy import SQLAlchemy
> from flask_session import Session
> from flask.templating import Environment
>
> flask_session = Session()
>
> # Globally accessible libraries
> pgdb = SQLAlchemy()
> from sqlalchemy import MetaData
> from flask_sqlalchemy import SQLAlchemy
> metadata = MetaData()
>
> def create_app():
>     """Initialize the core application."""
>     #app = Flask(__name__, instance_relative_config=False)
>     #app = Flask(__name__)
>     app = Flask('mars')
>
>     app.config.from_pyfile('config.cfg')
>     flask_session.init_app(app)
>     session = {'MASTERBLASTER': "Some really stupid stuff"}
>
> and I get that dreaded 'out of context' on the view ....
>
> As always thanks ...
>
> *Ben Duncan*
> DBA / Chief Software Architect
> Mississippi State Supreme Court
> Electronic Filing Division
>
>
> On Thu, Oct 31, 2019 at 8:19 AM Josh Stephens <bsdtux at gmail.com> wrote:
>
>> Ben,
>>
>>   Sorry I just saw this after replying to your first email. Can you try
>> moving your flask_session = Session() out of the create_app(). Keep the
>> flask_session.init_app(app) where it is. I am thinking this is probably
>> where your issue is coming from because flask_session is not at a global
>> level but in your function and thus I feel like it might be disappearing
>> after your return app from create_app
>>
>> Best Regards,
>> Josh Stephens
>>
>>
>> On October 30, 2019 at 7:55:35 AM, Ben Duncan (linux4ms at gmail.com) wrote:
>>
>> I've gotten my blueprint stuff working partially. I'm using the function
>> style
>> as defined here :
>> https://danidee10.github.io/2016/11/20/flask-by-example-8.html
>>
>> I have a master directory called mars and my blueprints are in a directory
>> called view under mars.
>>
>> My mars  application __init__ looks like:
>> # -------------------------------------------- _root _iinit__.py
>> import sys
>> from flask import Flask, g
>> from flask_sqlalchemy import SQLAlchemy
>> from flask_session import Session
>> from flask import session
>>
>> # Globally accessible libraries
>> pgdb = SQLAlchemy()
>> from sqlalchemy import MetaData
>> from flask_sqlalchemy import SQLAlchemy
>> metadata = MetaData()
>>
>>
>> def create_app():
>>     """Initialize the core application."""
>>     #app = Flask(__name__, instance_relative_config=False)
>>     app = Flask(__name__)
>>
>>     app.config.from_pyfile('config.cfg')
>>     flask_session = Session()
>>     flask_session.init_app(app)
>>
>>     session = {'modified': False }
>>     session = {'route': None }
>>     session = {'MASTERBLASTER': "Some really stupid stuff"}
>>
>>     # initialize Flask extensions
>>     #pgdb = SQLAlchemy()
>>     pgdb.app = app
>>     pgdb.init_app(app)
>>     pgdb.Model.metadata.reflect(pgdb.engine)
>>     class office_table(pgdb.Model):
>>        __table__ = pgdb.Model.metadata.tables['office']
>>
>>     # Initialize Blueprints
>>     with app.app_context():
>>         # Include our Routes
>>         #from . import routes
>>
>>         # Register Blueprints
>>         from .views.home import home
>>         app.register_blueprint( home )
>>
>>         from .views.auth import auth
>>         app.register_blueprint( auth )
>>
>>         from .views.ar import ar
>>         app.register_blueprint( ar )
>>
>>          return app
>> # -------------- End of Init
>>
>> My mars wsgi.py looks like this:
>>
>> #---------------------- Wsgi
>>
>> # Base wsgi application starter
>>
>> from mars import create_app
>> app = create_app()
>> if __name__ == "__main__":
>>   app.run()
>>
>> #-----
>>
>> And my run script looks like:
>> #!/bin/sh
>>
>> #rm -rf flask_session/*
>> export FLASK_APP=wsgi.py
>> export FLASK_ENV=development
>> flask run --host=0.0.0.0 --cert=adhoc
>>
>> Under views, __iinit__.py is empty and and my home.py looks like
>> #---- home.py
>> # mars/views/home
>> from flask import Blueprint, render_template, request, session
>> # Insert libraries as needed !!!
>>
>> home = Blueprint('home', __name__)
>>
>> @home.route('/<user_url_slug>')
>> def welcome(user_url_slug):
>> # Do some stuff
>>     return render_template('home/welcome.html', session=session)
>>
>> #--- end of home.
>> My html template file has this in it:
>>
>>   <h1>Hello From Template Form !!!</h1>
>>   <h1>Insert your code here !!!</h1>
>>   <h1>---- HOME ----</h1>
>>   <h1>---- 2 HOME ----</h1>
>>   <h1>session:  {{ session['MASTERBLASTER'] }} </h1>
>>
>> *My question/issue is* , that I need 'session' found in root __init__.py
>> and the
>> pgdb stuff to be available to the views/<bp>.py
>>
>> Am I setup correctly above? Am I missing something, what do I need to do ?
>> -- OR --
>> DO I need to give up and go home 😉 ?
>>
>>
>> Thanks ...
>> *Ben Duncan*
>> DBA / Chief Software Architect
>> Mississippi State Supreme Court
>> Electronic Filing Division
>> _______________________________________________
>> Flask mailing list
>> Flask at python.org
>> https://mail.python.org/mailman/listinfo/flask
>>
>>
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